Maximum power transfer theorem

  • #1
prashantgolu
50
0
i was solving one question...it said find out value of r in a circuit so that the 6 ohm resistor consumes maximum power.....i applied max power theorem .....and calculated the thevenin eqivalent resistance accrss 6 ohm resistance....and put it equal to 6.....but the r cam eout to be negative...so wat to conclude from this...
 

Answers and Replies

  • #2
MATLABdude
Science Advisor
1,664
5
It would help if you posted a diagram of the circuit in question. If this is an ideal source in series with a source resistance and the 6 ohm resistor, then this question is best answered by thinking about the following question:

What is the max power transfer theorem?

I suspect a Mod will be by shortly to move this question, but homework questions like these should be posed in the Homework section:
https://www.physicsforums.com/forumdisplay.php?f=152
 
  • #3
prashantgolu
50
0
yes...its just an ideal source...some resistances and a 6 ohm resistance...i just removed it and found out thevenin equivalent across its terminals...and compared it to be 6 for max theorem..i am attaching a file
 

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  • #4
MATLABdude
Science Advisor
1,664
5
As you surmise, max power transfer happens when the load resistance is equal to the source resistance. Have you determined the Thevenin equivalent of the circuit connected to the 6 ohm resistor (i.e. everything to the left of that resistor)?
 

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